Question:
Vyberte všechny výrazy, jejichž hodnota je rovna nule:
Project ID:
7400120039
Answer 1:
$$
\sin^2\left(-\frac{3\pi}{4}\right)+\cos\left(-\frac{4\pi}{3}\right)
$$
Answer 1 Correct:
1
Answer 2:
$$
\sin\,3\pi-\cos(-\pi)
$$
Answer 2 Correct:
0
Answer 3:
$$
\cos\,\frac{2\pi}{3}+\sin^2\,\frac{11\pi}{4}
$$
Answer 3 Correct:
1
Answer 4:
$$
\mathrm{cotg}\,\frac{5\pi}{4}-2\sin\left(-\frac{7\pi}{6}\right)
$$
Answer 4 Correct:
1
Answer 5:
$$
\cos^2\left(\frac{3\pi}{4}\right)-\sin^2\left(\frac{3\pi}{4}\right)
$$
Answer 5 Correct:
1
Answer 6:
$$
\sin^2\left(\frac{7\pi}{6}\right) +\cos^2\left(\frac{\pi}{3}\right)
$$
Answer 6 Correct:
0
Answer 7:
$$
\sin\left(-\frac{21\pi}{7}\right)\cdot \cos\,\frac{2\pi}{3}
$$
Answer 7 Correct:
1
Answer 8:
$$ \cos\,\frac{\pi}{2}-\sin\,\frac{\pi}{2} $$
Answer 8 Correct:
0